var userName = process.argv[2];
var pwd = process.argv[3];
var str = "userName: "+userName +" pwd: "+pwd;
console.log(str);
var buf1 = Buffer.from(str,"utf-8");//默认utf8编码方式
var str1=buf1.toString("base64");//向字符串转换时，用base64
console.log(str1);
//输出乱码保护信息
